Of course the injuries are a bit bad at the moment, and under a competent manager like Xavi, we can expect the performances and results to improve both with just some more time, and with more healthy players coming back!
Stegen, Garcia, Alba, Busquets, Gavi, Pedri, Frenkie, Puig are GREAT players for the style I, Xavi and other tiqui taco connoisseurs want, maybe the best at their positions! Yes there is a lack of good forwards and maybe a few more positions, but it can be solved in winter, and players like Dembele and Depay should be able to add something from limited roles.
If we don't see an improvement under Xavi, I will not make excuses for him based on lack of squad quality. Of course there is always room (and need) for improvement though.